What airlines fly to Sofia?

Lufthansa, United Airlines and Air Canada are the top three most popular airlines that fly to Sofia from St. Louis according to our data. Lufthansa is the first choice among our users, with 61% of people opting to fly with this airline when traveling to Sofia. Keep in mind that there are 3 different airlines that fly to Sofia on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Lambert-St Louis Airport to Sofia Airport?

Prices for flights from Lambert-St Louis Airport to Sofia Airport are updated daily.

How many operators does momondo search for flights from Lambert-St Louis Airport to Sofia Airport?

The number of operators available for flights from Lambert-St Louis Airport to Sofia Airport is 3 as of August 2026.

How old do you have to be to fly from Lambert-St Louis Airport to Sofia Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Sofia Airport.

What documentation or ID do you need to fly to Sofia Airport?

The travel and health documents you'll need for your trip to Sofia Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Sofia Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$782 Cheap Flights from St. Louis to Sofia in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Sofia

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:04 pm - 10:55 pmSTL Lambert-St Louis-SOF Sofia

19h 51m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

2:10 pm - 3:26 pmSOF Sofia-STL Lambert-St Louis

33h 16m2 stops Frankfurt am Main Toronto Pearson Intl

$782United Airlines

Mon, Jan 11 - Thu, Jan 14

7:04 pm - 10:55 pmSTL Lambert-St Louis-SOF Sofia

19h 51m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

2:10 pm - 3:26 pmSOF Sofia-STL Lambert-St Louis

33h 16m2 stops Frankfurt am Main Toronto Pearson Intl

$783United Airlines

Mon, Jan 11 - Thu, Jan 14

6:50 pm - 6:20 pmSTL Lambert-St Louis-SOF Sofia

15h 30m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

6:25 am - 1:45 pmSOF Sofia-STL Lambert-St Louis

15h 20m1 stop Frankfurt am Main

$828Lufthansa

Wed, Nov 4 - Sun, Nov 15

3:40 pm - 6:10 pmSTL Lambert-St Louis-SOF Sofia

18h 30m1 stop Frankfurt am Main

6:25 am - 1:45 pmSOF Sofia-STL Lambert-St Louis

15h 20m1 stop Frankfurt am Main

$835Lufthansa

Wed, Nov 4 - Sun, Nov 15

6:50 pm - 6:20 pmSTL Lambert-St Louis-SOF Sofia

15h 30m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

2:10 pm - 3:26 pmSOF Sofia-STL Lambert-St Louis

33h 16m2 stops Frankfurt am Main Toronto Pearson Intl

$836Multiple Airlines

Wed, Nov 4 - Sun, Nov 15

1:29 pm - 12:10 pmSTL Lambert-St Louis-SOF Sofia

14h 41m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

6:10 am - 1:25 pmSOF Sofia-STL Lambert-St Louis

15h 15m1 stop Frankfurt am Main

$858Lufthansa

Wed, Oct 7 - Tue, Oct 13

9:40 am - 1:25 pmSTL Lambert-St Louis-SOF Sofia

19h 45m3 stops Chicago O'Hare Intl Toronto Pearson Intl Frankfurt am Main

2:10 pm - 3:26 pmSOF Sofia-STL Lambert-St Louis

33h 16m2 stops Frankfurt am Main Toronto Pearson Intl

$881Multiple Airlines

Wed, Nov 4 - Sun, Nov 15

7:30 am - 11:15 pmSTL Lambert-St Louis-SOF Sofia

31h 45m3 stops Newark Boston Logan Intl Munich Franz Josef Strauss

6:10 am - 6:41 pmSOF Sofia-STL Lambert-St Louis

20h 31m2 stops Frankfurt am Main Montreal Pierre Elliott Trudeau Intl

$886United Airlines

Wed, Oct 7 - Tue, Oct 13

9:40 am - 1:25 pmSTL Lambert-St Louis-SOF Sofia

19h 45m3 stops Chicago O'Hare Intl Toronto Pearson Intl Frankfurt am Main

6:25 am - 7:23 pmSOF Sofia-STL Lambert-St Louis

20h 58m3 stops Frankfurt am Main Toronto Pearson Intl Chicago O'Hare Intl

$892Air Canada

Wed, Nov 4 - Sun, Nov 15

9:37 am - 1:25 pmSTL Lambert-St Louis-SOF Sofia

19h 48m3 stops Chicago O'Hare Intl Toronto Pearson Intl Frankfurt am Main

2:10 pm - 10:42 amSOF Sofia-STL Lambert-St Louis

28h 32m3 stops Frankfurt am Main Toronto Pearson Intl Chicago O'Hare Intl

$904Air Canada

Wed, Dec 16 - Fri, Dec 25

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United Airlines flights from St. Louis to Sofia

Our best United Airlines deals on St. Louis to Sofia flight tickets

United Airlines

Jan 11

STL7:04 pmLambert-St Louis

19h 51m

2 stops

SOF10:55 pmSofia

Jan 14

SOF2:10 pmSofia

33h 16m

2 stops

STL3:26 pmLambert-St Louis

$782

United Airlines

Jan 11

STL7:04 pmLambert-St Louis

19h 51m

2 stops

SOF10:55 pmSofia

Jan 14

SOF2:10 pmSofia

33h 16m

2 stops

STL3:26 pmLambert-St Louis

$783

United Airlines

Oct 7

STL7:30 amLambert-St Louis

31h 45m

3 stops

SOF11:15 pmSofia

Oct 13

SOF6:10 amSofia

20h 31m

2 stops

STL6:41 pmLambert-St Louis

$886

Lufthansa flights from St. Louis to Sofia

Our best Lufthansa deals on St. Louis to Sofia flight tickets

Lufthansa

Nov 4

STL6:50 pmLambert-St Louis

15h 30m

2 stops

SOF6:20 pmSofia

Nov 15

SOF6:25 amSofia

15h 20m

1 stop

STL1:45 pmLambert-St Louis

$828

Lufthansa

Nov 4

STL3:40 pmLambert-St Louis

18h 30m

1 stop

SOF6:10 pmSofia

Nov 15

SOF6:25 amSofia

15h 20m

1 stop

STL1:45 pmLambert-St Louis

$835

Lufthansa

Oct 7

STL1:29 pmLambert-St Louis

14h 41m

2 stops

SOF12:10 pmSofia

Oct 13

SOF6:10 amSofia

15h 15m

1 stop

STL1:25 pmLambert-St Louis

$858

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisSofia

STL Lambert-St Louis - SOF Sofia

STLSOF

Lambert-St Louis

Mon 1/11

7:04 pm-10:55 pm

2 stops19h 51m

Sofia

Thu 1/14

2:10 pm-3:26 pm

2 stops33h 16m

$782

St. LouisSofia

STL Lambert-St Louis - SOF Sofia

STLSOF

Lambert-St Louis

Mon 1/11

7:04 pm-10:55 pm

2 stops19h 51m

Sofia

Thu 1/14

2:10 pm-3:26 pm

2 stops33h 16m

$783

St. LouisSofia

STL Lambert-St Louis - SOF Sofia

STLSOF

Lambert-St Louis

Wed 11/4

6:50 pm-6:20 pm

2 stops15h 30m

Sofia

Sun 11/15

6:25 am-1:45 pm

1 stop15h 20m

$828

St. LouisSofia

STL Lambert-St Louis - SOF Sofia

STLSOF

Lambert-St Louis

Wed 11/4

3:40 pm-6:10 pm

1 stop18h 30m

Sofia

Sun 11/15

6:25 am-1:45 pm

1 stop15h 20m

$835

St. LouisSofia

STL Lambert-St Louis - SOF Sofia

STLSOF

Lambert-St Louis

Wed 11/4

6:50 pm-6:20 pm

2 stops15h 30m

Sofia

Sun 11/15

2:10 pm-3:26 pm

2 stops33h 16m

$836

Quickest round-trip

St. LouisSofia

STL Lambert-St Louis - SOF Sofia

STLSOF

Lambert-St Louis

Wed 10/7

1:29 pm-12:10 pm

2 stops14h 41m

Sofia

Tue 10/13

6:10 am-1:25 pm

1 stop15h 15m

$858

St. LouisSofia

STL Lambert-St Louis - SOF Sofia

STLSOF

Lambert-St Louis

Wed 11/4

9:40 am-1:25 pm

3 stops19h 45m

Sofia

Sun 11/15

2:10 pm-3:26 pm

2 stops33h 16m

$881

St. LouisSofia

STL Lambert-St Louis - SOF Sofia

STLSOF

Lambert-St Louis

Wed 10/7

7:30 am-11:15 pm

3 stops31h 45m

Sofia

Tue 10/13

6:10 am-6:41 pm

2 stops20h 31m

$886

St. LouisSofia

STL Lambert-St Louis - SOF Sofia

STLSOF

Lambert-St Louis

Wed 11/4

9:40 am-1:25 pm

3 stops19h 45m

Sofia

Sun 11/15

6:25 am-7:23 pm

3 stops20h 58m

$892

St. LouisSofia

STL Lambert-St Louis - SOF Sofia

STLSOF

Lambert-St Louis

Wed 12/16

9:37 am-1:25 pm

3 stops19h 48m

Sofia

Fri 12/25

2:10 pm-10:42 am

3 stops28h 32m

$904

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from St. Louis to Sofia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the typical price of a round-trip flight between St. Louis and Sofia?

Prices are currently typical for flights on this route.

Typical prices usually range from $716 to $838.
The lowest price recently found on this route was $782.

What is the cheapest month to fly to Sofia?

The cheapest month to fly to Sofia from St. Louis is in October. Flight prices, which tend to average around $0, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of October, then book flights to Sofia from St. Louis during January instead. Flights to Sofia in January, while not as cheap as those in October, still average around $528.

Can stopping save me money on St. Louis to Sofia flights?

You could potentially save up to 44% on your flight if you consider stops on a St. Louis to Sofia flight.

When to book flights from St. Louis to Sofia

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Sofia according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap St. Louis to Sofia (STL to SOF) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Sofia

Best Price Found	$782
Fastest flight time	14h 41m
Direct flights	None

The best flight deal from St. Louis to Sofia found on momondo in the last 72 hours is $782

The fastest flight from St. Louis to Sofia takes 14h 41m

There are no direct flights from St. Louis to Sofia. There are no popular flight routes from St. Louis to Sofia.

Search flight deals

Frequently asked questions about flying from St. Louis to Sofia

How far is Lambert-St Louis to Sofia by plane?
A flight from Lambert-St Louis to Sofia will travel around 5441.0 mi. 14h 41m is a normal flight duration for this route.
When did momondo last update prices for flights from Lambert-St Louis Airport to Sofia Airport?
Prices for flights from Lambert-St Louis Airport to Sofia Airport are updated daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Sofia Airport?
The number of operators available for flights from Lambert-St Louis Airport to Sofia Airport is 3 as of August 2026.
How old do you have to be to fly from Lambert-St Louis Airport to Sofia Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Sofia Airport.
What documentation or ID do you need to fly to Sofia Airport?
The travel and health documents you'll need for your trip to Sofia Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Sofia Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from St. Louis to Sofia?
Based on momondo bookings for flights between St. Louis and Sofia, the leading airline is Lufthansa, making up 61% of the total bookings. Other popular airlines include United Airlines with 22% and Air Canada with 17%.

Best airlines flying from St. Louis to Sofia

Compare and see reviews for airlines that fly from St. Louis to Sofia with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $559	Free Cancellation	Rating 7.4 10,107 reviews	Search United Airlines flights
Lufthansa	PriceFrom $560	Free Cancellation	Rating 6.8 8,203 reviews	Search Lufthansa flights
Air Canada	PriceFrom $1,108	Free Cancellation	Rating 7.1 11,514 reviews	Search Air Canada flights

Bansko

Borovets

Velingrad

Sandanski

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Why should I use momondo to find a flight deal from St. Louis to Sofia?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Sofia. momondo saves you time and could save you money on your trip.

Can I find flights from St. Louis to Sofia with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Sofia from St. Louis with this policy.

How can momondo help me find flights from St. Louis to Sofia?

Once all potential St. Louis to Sofia flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from St. Louis to Sofia right now. Can momondo alert me if prices change?

Price alerts on flights to Sofia from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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Cheap flights from St. Louis to Sofia from $782

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Sofia departing on 1/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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United Airlines flights from St. Louis to Sofia

Our best United Airlines deals on St. Louis to Sofia flight tickets

Lufthansa flights from St. Louis to Sofia

Our best Lufthansa deals on St. Louis to Sofia flight tickets

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How to get the cheapest flight ticket from St. Louis to Sofia

What is the typical price of a round-trip flight between St. Louis and Sofia?

What is the cheapest month to fly to Sofia?

Can stopping save me money on St. Louis to Sofia flights?

What airlines fly to Sofia?

When to book flights from St. Louis to Sofia

Cheap St. Louis to Sofia (STL to SOF) flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from St. Louis to Sofia

Best airlines flying from St. Louis to Sofia

Compare and see reviews for airlines that fly from St. Louis to Sofia with momondo

Traveling to a place near Sofia?

Why use momondo?

An easier way to manage your Sofia trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Bulgaria

Fly your favorite airline to Sofia

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Cabin classes currently available on flights to Sofia

List of cabin classes available on flights landing in Sofia. Availability may vary depending on flight origin and airline.

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